There are a number of other tools you can use as well, one is CBENGINE I use this to find Re-listed Products.
If a prouduct has done well in the past there is a good chance the updated version will do well also, Just click on the Re-listed in the left side bar and it will give you the latest list of Re-listed products.
There are 157 Re-listed products showing up today, just scan down the list and see if you find anything you might want to promote, just be sure and run your full research on them. Another site I like to use is CB-ANALYTICS
Using cb-analytics you can search by Gravity, Earned Per Sale, Page Rank and many more, I like to look at the unique vistors and PR, if they are getting a lot of traffic and have a good PR, this will in crease you chance of making a sale.
Having this information also helps if its a new product and there is not much other information on the vendor.